威胁：缺少统一固定的表演形式，且自从1990年以来，登台表演只零星地有过。
Threats: The lack of a consistent programme for Kunqu performances, which, since 1990, have only been staged sporadically.
理论上，对公告送达的研究大多停留在零星的技术阐述层面，且成果不多。
Theoretically, the research of service by public stays on the technical and piecemeal demonstration level, and the achievement is little.
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